4. Install the new modem:a. Connect the T-shaped connector of the modem cable to the modem.b. Align the modem with the screw holes and press the modem into its connector on the system board (see System Board Components).c. Replace and tighten the two screws to secure the modem to the system board.d. Replace the other end of the modem cable to the RJ11 internal connector.5. Connect the power cable to the power connector (POWER) on the system board (see System Board Components).6. Replace the hard drive (see Installing a Hard Drive).7. Replace the computer cover (see Replacing the Computer Cover).Power SupplyRemoving the Power Supply1. Follow the procedures in Before You Begin.2. Disconnect the AC power cable from the power supply connector.3. Disconnect all DC power cables from the system board and drives.4. Remove the three power supply screws.1 pull tab 2 modemcable3 screws (2)4 RJ11 internal connector(RJ11INT)5 modem 6 T-shaped connector attached to themodem cableNOTICE: The connectors are keyed to ensure correct insertion. If you feel resistance, check the connectors for proper orientation, then try again.CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of thecomputer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components.